CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($)	Mar. 31, 2022	Dec. 31, 2021
Assets
Cash and cash equivalents	$ 165,910,492	$ 64,244,983
Other current assets	1,617,557	2,514,602
Total current assets	167,528,049	66,759,585
Property, plant and mine development, net	48,132,617	40,055,354
Operating lease right-of-use assets	28,668	60,919
Other non-current assets	8,131,138	4,500,203
Equity investments in unconsolidated affiliates	57,723,058	58,872,710
Total assets	281,543,530	170,248,771
Liabilities and Stockholders’ Equity
Accounts payable	1,521,985	1,262,744
Accrued expenses	3,735,866	5,425,498
Current portion of long-term debt	722,301	762,189
Operating lease liabilities	29,485	59,430
Other current liabilities	29,906	40,157
Total current liabilities	6,039,543	7,550,018
Long-term debt, net of current portion	706,801	914,147
Total liabilities	6,746,344	8,464,165
Commitments and contingencies (Note 11)
Stockholders’ equity:
Common stock; $0.0001 par value, 100,000,000 shares authorized; 17,929,526, and 15,894,395, shares issued and outstanding at March 31, 2022, and December 31, 2021, respectively	1,793	1,589
Additional paid-in capital	377,105,200	255,131,836
Accumulated deficit	(101,837,632)	(92,683,000)
Accumulated other comprehensive income (loss)	(472,175)	(665,819)
Total stockholders’ equity	274,797,186	161,784,606
Total liabilities and stockholders’ equity	$ 281,543,530	$ 170,248,771